47) In which type of economic system does the consumer have the fewest options?

A) capitalism B) communism C) socialism D) mixed

Air pollution affects every one equally

Which best describes how DNA is used as a molecular clock? The number of mutations in DNA is compared between two species. The total amount of DNA is compared between two species. The percent of carbon in DNA is compared between parent and offspring.

A student analyzes data of the motion of a planet as it orbits a star that is in deep space. The orbit of the planet is considered to be stable and does not change over time.

A nuclear particle with no charge

If it makes you happy, then why you so sad

Which statement is true about the atom? A: it contains positive electrons, uncharged protons and negative protons. B: it contains uncharged neutrons, positive electrons and negative protons.

Steel objects can become temporary magnets because they are mainly composed of which element?

How long does it takes the sun to rotate the earth?

Which explains how winds move?

Why is it important to develop alternative energy sources